Alta labs config for wireguard alerts

Config files
This sends alerts to discord to know when someone connects. 

 First i created a script called check_wg_peer.sh in /cfg so its persistent between reboots. 

   

 #!/bin/sh

# -------- Configuration --------

PEER=""

NAME="Dale"

WEBHOOK_URL=""

STATE_FILE="/cfg/wg_${NAME}_state"

TIMEOUT=180 # seconds, longer than handshake interval

# -------- Get latest handshake timestamp --------

HANDSHAKE=$(wg show wg latest-handshakes | grep "$PEER" | awk '{print $2}')

NOW=$(date +%s)

DIFF=$((NOW - HANDSHAKE))

# -------- Read previous state --------

PREV_STATE="disconnected"

[ -f "$STATE_FILE" ] && PREV_STATE=$(cat "$STATE_FILE")

# -------- Determine current state --------

if [ "$DIFF" -le "$TIMEOUT" ]; then

 CURR_STATE="connected"

else

 CURR_STATE="disconnected"

fi

# -------- Send alert on transition --------

if [ "$CURR_STATE" = "connected" ] && [ "$PREV_STATE" != "connected" ]; then

 curl -s -H "Content-Type: application/json" \

 -X POST \

 -d "{\"content\": \"Peer $NAME just connected to WireGuard!\"}" \

 "$WEBHOOK_URL"

 echo "Alert sent for $NAME"

fi

# -------- Save current state --------

echo "$CURR_STATE" > "$STATE_FILE" 

 Then I added this to my rc.local within /cfg 

 # === WireGuard Discord Alert Cron Job ===

WG_ALERT_SCRIPT="/cfg/check_wg_peer.sh"

# Make sure the script is executable

chmod +x "$WG_ALERT_SCRIPT"

# Add cron job if it doesn't already exist

grep -q "$WG_ALERT_SCRIPT" /etc/crontabs/root || echo "* * * * * $WG_ALERT_SCRIPT" >> /etc/crontabs/root